I didn't watched this video yet. I opened it thinking that it will be another part about magnetism. I highly value the magnetism videos, because they have different point of view, but on the same time I felt a little bored. I'm watching physics related videos for over a year. All of Science Asylum (multiple time) PBS Space Time, Crash course (Astronomy, Chemistry), David Butler, Periodic Videos, The Royal Institute, Sixty Symbols, Anton Petrov, Fermilab, Dr. Becky, DeepSkyVideos. Everybody always says: for non rotating black hole, in case of uncharged non rotating black hole. I even see Matt O'Dowd (from PBSSpaceTime) standing in front of me saying: "for uncharged non rotating black hole". Nick, you nailed the subject!
3:38 : Great animation. I had to pause and ponder if that could actually be possible and under what conditions. Awesome way to explain things. I did say "Wow" there. :) Great job Nick
"Conservation of energy shall not be vio-lat-ed!". I had to pause and rewind three times through this because I'm laughing. Great entertaining learning experience, as always.
I love this guy so much ,he helps me understand science and physics unlike the other science youtubers . And what i love is that he makes it fun and adds in jokes into the video AND WHAT I LOVE THE MOST ARE THE RULES THAT HE MADE ESPECIALLY THE ONE WHERE U GOTTA QUESTION EVERYTHING AND GO DEEP INTO DETAIL !!! ❤️
@@ScienceAsylum i have a question. if force exerted on a mass is some form of wierd curvature of spacetime. does charge also bend spacetime to exert force.
Hmm interesting. Is there more to this or is it anecdotal? Nature always impresses us with its scaled similarities. Waves in a pond, vs EM waves, gravity waves, etc.
Noone At all you can actually bypass conservation of energy. Read about Noether Theorem on Conservation of energy. Also, in antimatter annihilation energy is lost. In dark energy, energy is being created. Here is a link to where you can learn more. I’m not sure if you know this yet, but almost everything in classical physics isn’t completely correct. In the 20th century, classical physics was replaced with quantum physics and relativity. Which still remains today.
Honestly, my favorite science channel. Thank you for verifying my belief that nothing can have infinite density, you probably learn this as a physicist, but I have not read about it not being true in anything I have read
When a physics formula generates an infinity, you have come across either: 1) an impossibility or 2) a situation where the math breaks down and no longer accurately describes reality.
again guys, its the most underrated channel.. please do show your support and make the science win . see, i don't know the host in person, nor do i have any links with the channel but people like this always cheer me up to do science. it was the first youtube channel about science that i ever watched and since then, i am motivated and passionate for the same.the way he explains the things , so simply is truly an art worth appreciation. thanks science asylum
Excellent quick description of black holes from outside the event horizon. Black holes are a topic that I’ve spent months personally researching. The inside is where things get really weird, they don’t have an inside in a spatial sense.
Luke, time and space switch signs inside the horizon, so they switch behaviors. The singularity isn't a place in space, but an inevitable future in time.
@@haulin The singularity is a point in future time, not a point in space. Getting always closer to the singularity is a forward change in your time position coordinate, not a forward change in your spatial position coordinate. Black holes are time prisons. There is one escape, as Hawking radiation, billions of years later in outside time, minutes to days later by a clock you carry with you. I said they are really weird inside. Edit: Nick beat me to a reply. Happily we agree.
Because Christopher nolan wanted to make a scientifically accurate movie. He got a theoretical physicist and talked to him for several weeks to see what should he do. For example what shape should a blackhole have ( a sphere, which is correct ). The lensing of light around a blackhole and other things. The formulae written on that chalkboard on the movie are the *actual formulae for blackholes* not some random physics formulae. The spacesuits are *real suits* . The scenery was *real* and not green screen. If you see behind the scenes you will be mindblown. ( spoiler alert, he didn't use much special effects with computer. ) Nolan is a genius.
@@shayanmoosavi9139 It's actually only accurate about the space-time "stuff". I'm an Environmental Scientist and found some stuff let's say - irritating. And the behaviour of the protagonists made not every time sense. But I still love the movie and the music is great in combination with the pictures. And I really didn't mind the length of the movie and was sad when it was over.
@@MsSonali1980 agreed :) of course it wasn't 100% accurate. It's extremely difficult to make a 100% accurate movie if not impossible but he did a great job. He has great relationships with the actors and it's a characteristic of a great director. I absolutely loved interstellar and I'm planning on watching his new movie Dunkirk as well.
@@shayanmoosavi9139 Not mentioning the accuracy of entering into the BH. And that he survived, and that he traveled back in time. So, too much accuracies made me think about studying astrophysics from movies. But it's an OK sci-fi movie!
@@VeronicaGorositoMusic I already said it's not 100% accurate. It's extremely difficult (if not impossible) to make a 100% accurate movie. nobody knows what happens when we enter the singularity because the laws of physics fail. there's simply not enough data to conclude what happens there so it's perfectly ok for sci-fi artists to let their imagination guide them. there's nothing wrong with having an active imagination. Today we have technologies which have been considered Sci-fi and impossible before. Who would have thought some day we'll have smartphones with touch-screens which stores 256GB of information on a very tiny hard-drive? Who would have thought that VR games can be a reality?
It took 2.06 minutes to go from "cogito, ergo sum" to "conservation laws, ergosphere" Been waiting for someone to tackle rotating black holes for a while, pleased it was Nick
Star dust vsauce would use a ringularity for a ring and then realise a ringularity doesn't exist and then tries to debate with himself whether it exists or not
I always wondered why non rotating black holes were a thing. No matter how much you learn there's always things about the universe that will blow your mind away.
2:02, 2:49, 6:03 - lol. 😁 Nice to hear a scientist acknowledge that we don't think there's *actually* a singularity inside; it's where the math breaks down. (Assuming I understood correctly.) I've thought that for a while.
That isn't what he said at all. From the perspective of the outside Universe, the physical blackhole is literally a pinpoint in space. Only the event horizon has physical dimension, like a wierd atmosphere on a very weird planet. From the frame of the blackhole? That is where theoretical and sci-fi speculation comes in.
I like your crazy vibe. The time dilation of using the ergosphere would cause some weird effects for sure. "I'm going to get some energy honey, see you in a hundred million years."
Nice. Although I'm not a physicist, my father is, and we have gotten into lengthy discussions about rotating black holes and some of the wilder speculations about them. The escape by releasing mass thing is new to me, though. It seems like, if there's an accretion disc, you would be subject to all kinds of radiation and such, though. Am I right on that, or all wet? Cool channel, BTW. I have subscribed and rung the bell. You're a hoot!
You spin my head right round, right round When you go down, when you go down down You spin my head right round, right round When you go down, when you go down down
And for the math approach - singularity is a point, and point has no dimensions. Therefore you can't describe the spin of a point, assigning some spin to a point is... pointless? The simplest "thing" that could have some meaningful spin is a flat, two-dimensional ring, so it became our concept for a spinning singularity.
Shpagel TheDuck Can a ringularity be called a donut hole? Seriously though, I wonder what would be in the hole. Wasn’t this part of a time travel theory also involving wormholes?
@@minties01 ok, but one thing here - electron is not a point, it was experimentally proven it's a very fine sphere, wasn't it? Albeit so small that's it just barely making sense, so it's convenient to treat it as a point in many cases. Second thing is that electron spin is quantum feature, while rotation of a black hole (or singularity) is a classical thing (it's used in general relativity which is classical), even if singularity is so small it surely has to deal with quantum physics. We just don't know how yet. In case of a point, with spatial dimensions of 0, classical physics simply can't describe it's rotation or angular momentum. It just lacks features to differentiate the rotation around different axes, while the flat ring is the minimal figure that can actually support this idea. But then again, as we could experimentally measure the spherical shape of an electron, we can only guess and imagine what really exists behind the event horizon. So all of that is just mathematical representation of what we think exists there, and everyone would be happy if this madness we came up with could be confirmed to not actually be true. ;)
@@ScienceAsylum Except that the very end in near. Big rip of the universe is expected in 1 billion to 1 trillion years as latest indications are that the dark energy pro volumina is not a constant, but increases slightly as well.
Agent Smith said, Like a virus but then Neo joined the One named Smith and the Yin and Yang were back in balance in a new evolution of cooperation like the mitochondria joining our cells.
I think the thing that is stopping civilizations from colonizing the cosmos is the fact the we (and presumably other (our-kind)intelligent civilizations) save the weak eventually corrupting our DNA with all the defects that natural selection would have gotten rid of. not saying close all the hospitals... just saying, you know?
If you spin very fast, your gravitational field will twist and squeeze in around you making your outer edge squeeze in a bit too, but your matter will fly apart first. Black holes can take it further because they have no matter to fly apart, they are just a spinning gravitational field around an empty patch of space.
It doesn't weaken gravity. The trick is to realise that in general relativity gravity isn't a simple force. Let's comapre it to newtonian gravity. Every point in space 3 numbers can describe the gravitational force. In relativity, the metric tensor describes gravity, and it has 10 different components. Gravity in general relativity does more than attract. It does all konds of weired things, like explained in this video. You can't describe the strength of a gravitational field by the radius of it's event horizon. That's the trick.
Inside the ergosphere, the time component switches sign, so it behaves more like space. You won't be able to stay in one place anymore than you can stay at one point in time.
@@ScienceAsylum What happens with the space components? I've heard people saying before that beyond the event horizon time and space switch roles. Kind of difficult to picture that. Didn't even hear about the ergosphere until today, so thanks for talking about that.
Dude, usualy i satay out of topic coments because, generaly, my english doesn't keep up with a mor informal way os talk but, man. ia have to stop to say that, aside the great information, you puns are awesome. Some day i'll be in you patreon rank. Until ther, gonna keep working. Nice job, dude, thanks for the content.
0:50 "Unless something can be experimentally verified, you probably shouldn't call it science." Wow, that hits kinda hard in 2022. BTW, this is my new favorite channel. I'm only scratching the surface but keep'em coming.
@@ScienceAsylum It might be physical in the sense of turning you into a crispy critter when crossing it if the firewall thing really happens. Or has there been a well-accepted explanation for why that could not occur?
I’m not sure we could live long enough to interact with black holes or their ergospheres... I love your videos on black holes though... and your channel in general.
At 3:10 you said that black holes absorbs angular momentum of the stuff or star that they eat ? How angular momentum can increased by absorbing or eating a stuff which already have it ....?!
i like the fact that many channelas as of 2062019 lately tend to focus on video explanation not just copy stuff like wikipedia..to tell u the info without good explanations..but to adapt ot the human brain
I've realized there's a deep meta to your channel. That meta is you are teaching and speaking to all of your crazy clones, and that includes your viewers. But in the clone hierarchy only the question clone speaks for us. So it makes me wonder, which clone of you am i?
Good lord 4:19 that metric of a rotating black hole, saw just a few seconds of screen time and was enough to give me a heart attack, diabetes, osteoporosis and back pain xΔ Well, If Humans are ever able to harvest energy from black holes (and I don't mean those pesky miniscule gravitational waves...) the'll have to be so tecnologicaly advanced that they could easily create spacetime ships to travel to other universes and beyond... aka not... not very likely... :P Awesome video as always Science Asylum!
Yeah... and the metric it's been simplified using GR units and some clever definitions (Schwarzschild radius and angular momentum). It's actually slightly nastier than it looks.
Why would anyone be surprised that these things spin?? They're just super dense objects in space. Do we think that they don't spin just cause they're a black hole and we cant directly observe it??
I don't think it's the idea that they can spin that's surprising, but the sheer speed and power of that spin, as well as its effect on the surrounding space. Although one might be surprised anyway, since looking at a black hole straight on, it's pretty much impossible to tell if it's spinning since there's no surface detail or shadows for our brains to tell
Gr8! I gathered the direction of your presentation but couldn't move along all the way. The physics-maths of BH is so complicated that my mind gets frame dragged 😄. Bottom line: Reference frame itself gets contorted & we don't realize it; just as much as the magician's tricks. What you see is not what happens.
I sometimes wonder if the Universe is the result of math giving up on trying to define nothing and deciding to see what it could do with it or maybe nothing decided to see what it could do with Math. I think the Universe consists of two things, One is nothing the other Math but I don't think either are European. 🤔
Physical singularities are non-physical, not because it is "fun math, but can not be reality", but because there is no way to execute an experiment and find out (test hypothesis) what is going on "in a region" disconnected from our local space-time. The assertion (the hypothesis) that there is (or is not) a singularity in the center of a black hole is unscientific because the hypothesis is unfalsifiable.
Fabulous! I wasn't aware of this feature of rotating blackholes. Surfing the ergosphere is basically akin to getting a free energy ride. Daring and dashing stuff. :)
Ehhh, yes and no. Our math does stop working there, but they sure are a physical entity. If we even manage to connect gravity with quantum mechanics, we will be able to describe those too.
A singularity is a concept, a mathematical infinity that may not even exist. Thank you for pointing out our lack of knowledge regarding the internals of a black hole, we really know nothing.
Thing with relativity is that it messes up all metal conceptions so much that you wonder if ‘spin’ really means the same as how earth spins or it’s some other spin in space time continuum.
I honestly don't know, from what I've watched docs and videos in youtube and what not. That is just what I have learned. I've understood that blackholes are so dense and spin so fast that nothing escapes from its event horizon.
There is also the “Super- Radiant Scattering “ and to do it you need: a mirror surrounding the black hole and an electromagnetic Ray gun. All you need to do is to shoot the electromagnetic wave gun into the mirror and will begin the process. The waves will bounce around the mirror and then The mirror and the waves will become exponentially stronger by opening some windows we can extract the energy from the black hole.
"Having points or or rings of infinite density, is fun math, but cannot be reality. So all this really shows us is a place where the math doesn't match the universe, not that the universe is broken." This is almost never said. A lot of people seem to think because we can't explain it, it must be truth.
my favorite speed is officially: "FAST FAST!!!!!!"
You must be german!
FAST FAST!!!!!! Is how fast I click the like button on one of these videos.
It's weird how just repeating one word makes you go. Wow.
Trying to understand black holes is hard, but rotating black holes really make my head spin.
Ahaha good one, Therion-sama.
@@feynstein1004 Thanks my friend ^_^
@Master Therion You're welcome :)
Ha!
@The Science Asylum Ahaha hey man. Waiting for your reply on my comment :P
You and CGP Grey are the only channels I click like before watch. Because I know it will be good no matter what.
do check out excurb1a too.
Good. . No MATTER what?
I didn't watched this video yet. I opened it thinking that it will be another part about magnetism. I highly value the magnetism videos, because they have different point of view, but on the same time I felt a little bored. I'm watching physics related videos for over a year. All of Science Asylum (multiple time) PBS Space Time, Crash course (Astronomy, Chemistry), David Butler, Periodic Videos, The Royal Institute, Sixty Symbols, Anton Petrov, Fermilab, Dr. Becky, DeepSkyVideos. Everybody always says: for non rotating black hole, in case of uncharged non rotating black hole. I even see Matt O'Dowd (from PBSSpaceTime) standing in front of me saying: "for uncharged non rotating black hole". Nick, you nailed the subject!
If most black holes rotate, then we should be spending most of our time talking about _them._
@@ScienceAsylum Yes, but physicists always start by talking about a spherical cow!
3:38 : Great animation. I had to pause and ponder if that could actually be possible and under what conditions. Awesome way to explain things. I did say "Wow" there. :) Great job Nick
*You get a spin, and you get a spin, and everybody gets a spin* Oprah intesifies
u spin me right round baby right round like a record baby right round round round
"Conservation of energy shall not be vio-lat-ed!". I had to pause and rewind three times through this because I'm laughing.
Great entertaining learning experience, as always.
I love this guy so much ,he helps me understand science and physics unlike the other science youtubers .
And what i love is that he makes it fun and adds in jokes into the video
AND WHAT I LOVE THE MOST ARE THE RULES THAT HE MADE ESPECIALLY THE ONE WHERE U GOTTA QUESTION EVERYTHING AND GO DEEP INTO DETAIL !!! ❤️
"I'm not an experimentalist" said while wearing a lab coat for every video.
Sorry, I can't resist pointing that one out XD
It helps me maintain my authority over my clones.
www.kevinmd.com/blog/2016/12/doctors-white-coat-really-mean.html
XD
@@ScienceAsylum i have a question. if force exerted on a mass is some form of wierd curvature of spacetime. does charge also bend spacetime to exert force.
he works in an asylum, duh...
Mass, charge and angular momentum. I've always been struck by this similarity between black holes and elementary particles.
Woah.
Blackholes likely are only elementary particles due to the extreme environments inside them
Indeed. If we could just drop the assumption of being in a special place (referring to scale)...
Hmm interesting. Is there more to this or is it anecdotal? Nature always impresses us with its scaled similarities. Waves in a pond, vs EM waves, gravity waves, etc.
@@alexpearson8481 I mean these singularities are to be expected, its the same universe after all
Now I need a hawking radiation video from u
Hear hear!
Hear hear!
RIP Hawking
I agree
THIS
The look at the camera before the "Fast-Fast" officially slayed me.
This guy is the best nerd teacher IMO.
Nick is Bill Nye Level of fun science.
My cousin said he read an article about this "way" to bypass conservation of energy.
A bus hit my cousin.
I lost my Bus driving license.
Humanity thanks you for your great sacrifice. Your bus license will be missed
You still deserve to be thanked.
you have done this for humanity. just if you are then don't feel guilty about you are a hero
Noone At all you can actually bypass conservation of energy. Read about Noether Theorem on Conservation of energy. Also, in antimatter annihilation energy is lost. In dark energy, energy is being created. Here is a link to where you can learn more. I’m not sure if you know this yet, but almost everything in classical physics isn’t completely correct. In the 20th century, classical physics was replaced with quantum physics and relativity. Which still remains today.
Noone At all ruclips.net/video/GHCc9b2phn0/видео.html
Honestly, my favorite science channel. Thank you for verifying my belief that nothing can have infinite density, you probably learn this as a physicist, but I have not read about it not being true in anything I have read
When a physics formula generates an infinity, you have come across either: 1) an impossibility or 2) a situation where the math breaks down and no longer accurately describes reality.
again guys, its the most underrated channel.. please do show your support and make the science win . see, i don't know the host in person, nor do i have any links with the channel but people like this always cheer me up to do science. it was the first youtube channel about science that i ever watched and since then, i am motivated and passionate for the same.the way he explains the things , so simply is truly an art worth appreciation.
thanks science asylum
Great video Nick! I remembered a Kurzgesagt video about harnessing the rotational energy like you said at the end, that is crazy!
Using the blackhole's energy reminds me of that scene from Interstellar
love that movie! and I was thinking the same thing
You have to leave something behind ... now I get it !
yeah..even i recalled that point
therealnightwriter how can you say that
therealnightwriter We have a flat earther in our midst
Finally! I've never found anyone or anything that could make rotating black holes make sense until now. Great job!
DCUO COVEN If it was possible, which it isn't.
Yeah today is the real valentine day for my love for science
Excellent quick description of black holes from outside the event horizon. Black holes are a topic that I’ve spent months personally researching. The inside is where things get really weird, they don’t have an inside in a spatial sense.
They don't? I thought you get always closer and closer to the singularity, so that sounds like change in position...
Luke, time and space switch signs inside the horizon, so they switch behaviors. The singularity isn't a place in space, but an inevitable future in time.
@@haulin
The singularity is a point in future time, not a point in space. Getting always closer to the singularity is a forward change in your time position coordinate, not a forward change in your spatial position coordinate. Black holes are time prisons. There is one escape, as Hawking radiation, billions of years later in outside time, minutes to days later by a clock you carry with you. I said they are really weird inside.
Edit: Nick beat me to a reply. Happily we agree.
The feeling when everything in "interstellar" makes sense 😮
That "ERGOSPHERE"...
Because Christopher nolan wanted to make a scientifically accurate movie. He got a theoretical physicist and talked to him for several weeks to see what should he do. For example what shape should a blackhole have ( a sphere, which is correct ). The lensing of light around a blackhole and other things. The formulae written on that chalkboard on the movie are the *actual formulae for blackholes* not some random physics formulae. The spacesuits are *real suits* . The scenery was *real* and not green screen.
If you see behind the scenes you will be mindblown. ( spoiler alert, he didn't use much special effects with computer. )
Nolan is a genius.
@@shayanmoosavi9139 It's actually only accurate about the space-time "stuff". I'm an Environmental Scientist and found some stuff let's say - irritating. And the behaviour of the protagonists made not every time sense. But I still love the movie and the music is great in combination with the pictures. And I really didn't mind the length of the movie and was sad when it was over.
@@MsSonali1980 agreed :)
of course it wasn't 100% accurate. It's extremely difficult to make a 100% accurate movie if not impossible but he did a great job. He has great relationships with the actors and it's a characteristic of a great director. I absolutely loved interstellar and I'm planning on watching his new movie Dunkirk as well.
@@shayanmoosavi9139 Not mentioning the accuracy of entering into the BH.
And that he survived, and that he traveled back in time.
So, too much accuracies made me think about studying astrophysics from movies.
But it's an OK sci-fi movie!
@@VeronicaGorositoMusic I already said it's not 100% accurate. It's extremely difficult (if not impossible) to make a 100% accurate movie. nobody knows what happens when we enter the singularity because the laws of physics fail. there's simply not enough data to conclude what happens there so it's perfectly ok for sci-fi artists to let their imagination guide them.
there's nothing wrong with having an active imagination. Today we have technologies which have been considered Sci-fi and impossible before. Who would have thought some day we'll have smartphones with touch-screens which stores 256GB of information on a very tiny hard-drive? Who would have thought that VR games can be a reality?
Amazing.
Can the nerd guy have his own episode?
Fastfast
Can the spinning one have his own episode? :D
Please don't, its already hard to understand what he said. Maybe with subtitle.
Yes! AcTuAlLy I love him :D but I think it's a little bit spit-y around his perimeter :DD
It took 2.06 minutes to go from "cogito, ergo sum" to "conservation laws, ergosphere"
Been waiting for someone to tackle rotating black holes for a while, pleased it was Nick
And they are also ergonomically correct! 😀
Hahaha
Just found this channel, loved your charisma. New subscriber!
Love the way you make me laugh along the way to understanding.
The comedy keeps me from getting dizzy.
Yes, black holes _can_ spin. Or can they?
_plays VSauce music_
Star dust vsauce would use a ringularity for a ring
and then realise a ringularity doesn't exist and then tries to debate with himself whether it exists or not
Are you trying to become next Justin.Y?
Lol
michael sitting on a toilet:
"Get out, Im taking a shit!"
"Or am I?" *smears camera with brown material*
You have the same comment on literally ever video
Awesome video. Keep up the good work Nick!
Angular momentum is such a crazy thing to calculate.
I always wondered why non rotating black holes were a thing. No matter how much you learn there's always things about the universe that will blow your mind away.
I'm a simple guy, when Nick uploads, I view, comment, like and share
And again you broadened my horizon, always a joyfull and interesting event when that happens. Thank you and keep spinning out more crazy stuff!
2:02, 2:49, 6:03 - lol. 😁
Nice to hear a scientist acknowledge that we don't think there's *actually* a singularity inside; it's where the math breaks down. (Assuming I understood correctly.) I've thought that for a while.
That isn't what he said at all.
From the perspective of the outside Universe, the physical blackhole is literally a pinpoint in space. Only the event horizon has physical dimension, like a wierd atmosphere on a very weird planet. From the frame of the blackhole? That is where theoretical and sci-fi speculation comes in.
@@jamestheotherone742 0:56.
@@ratamacue0320 Go read up on general relativity. Then read my post again.
@@jamestheotherone742 are you claiming that I've misrepresented Nick, or are you claiming that Nick misrepresented scientific consensus?
@@ratamacue0320 Its likely that you misunderstand scientific consensus as well as misunderstood the content of the video.
It shouldn't matter to me as much as it does, but I'm always happy when Nick and his clones are getting along.
Keep the good content NICK!
I like your crazy vibe. The time dilation of using the ergosphere would cause some weird effects for sure. "I'm going to get some energy honey, see you in a hundred million years."
Seriously.
Nice. Although I'm not a physicist, my father is, and we have gotten into lengthy discussions about rotating black holes and some of the wilder speculations about them. The escape by releasing mass thing is new to me, though. It seems like, if there's an accretion disc, you would be subject to all kinds of radiation and such, though. Am I right on that, or all wet? Cool channel, BTW. I have subscribed and rung the bell. You're a hoot!
You are correct that you don't really want to be anywhere near a black hole's accretion disk.
I actually understand the physics you talk. It is so refreshing!👍🚀
You spin my head right round, right round
When you go down, when you go down down
You spin my head right round, right round
When you go down, when you go down down
I was thinking that too! 😀
Man you needs to be noticed i hope you grow very fast
can we talk more about the ringularity and how it's even possible
btw best science channel next to vsauce
As said in this video, singularity and ringularity is not possible. They are only math outcomes.
And for the math approach - singularity is a point, and point has no dimensions. Therefore you can't describe the spin of a point, assigning some spin to a point is... pointless? The simplest "thing" that could have some meaningful spin is a flat, two-dimensional ring, so it became our concept for a spinning singularity.
@@BluesyBor Although a point can't have spin, it can have angular moment can't it? Such as an electron?
Shpagel TheDuck Can a ringularity be called a donut hole?
Seriously though, I wonder what would be in the hole. Wasn’t this part of a time travel theory also involving wormholes?
@@minties01 ok, but one thing here - electron is not a point, it was experimentally proven it's a very fine sphere, wasn't it? Albeit so small that's it just barely making sense, so it's convenient to treat it as a point in many cases. Second thing is that electron spin is quantum feature, while rotation of a black hole (or singularity) is a classical thing (it's used in general relativity which is classical), even if singularity is so small it surely has to deal with quantum physics. We just don't know how yet.
In case of a point, with spatial dimensions of 0, classical physics simply can't describe it's rotation or angular momentum. It just lacks features to differentiate the rotation around different axes, while the flat ring is the minimal figure that can actually support this idea.
But then again, as we could experimentally measure the spherical shape of an electron, we can only guess and imagine what really exists behind the event horizon. So all of that is just mathematical representation of what we think exists there, and everyone would be happy if this madness we came up with could be confirmed to not actually be true. ;)
Friggin hilarious how you looked at the camera, zooming in roght before your catch phrase "FAST FAST!"
I am an optimist. I believe that humans will colonize all galaxies until the very end
Me too.
@@ScienceAsylum Except that the very end in near. Big rip of the universe is expected in 1 billion to 1 trillion years as latest indications are that the dark energy pro volumina is not a constant, but increases slightly as well.
what a curse on all galaxies that is.... well, given the state of mind of most humans, infecting all galaxies would be a more accurate description.
Agent Smith said, Like a virus but then Neo joined the One named Smith and the Yin and Yang were back in balance in a new evolution of cooperation like the mitochondria joining our cells.
I think the thing that is stopping civilizations from colonizing the cosmos is the fact the we (and presumably other (our-kind)intelligent civilizations) save the weak eventually corrupting our DNA with all the defects that natural selection would have gotten rid of.
not saying close all the hospitals... just saying, you know?
Great video again! Never heard of this ergosphere. Fascinating.
2:06 😂👍.
So... Why does the act of spinning reduce the event horizon? If I spin does my gravitational field get smaller?
If you spin very fast, your gravitational field will twist and squeeze in around you making your outer edge squeeze in a bit too, but your matter will fly apart first. Black holes can take it further because they have no matter to fly apart, they are just a spinning gravitational field around an empty patch of space.
It doesn't weaken gravity. The trick is to realise that in general relativity gravity isn't a simple force. Let's comapre it to newtonian gravity. Every point in space 3 numbers can describe the gravitational force. In relativity, the metric tensor describes gravity, and it has 10 different components. Gravity in general relativity does more than attract. It does all konds of weired things, like explained in this video. You can't describe the strength of a gravitational field by the radius of it's event horizon. That's the trick.
This is such a great explanation for a problem I never thought about before!
My neighbors called police because i was loudly watching the science asylum
.
The police arrested them.
Did the cops chill with you after and binge?
Do you live in Soviet Russia?
@@drew8443 yes, he is captain of the concrete put team in Vladivostok. Very well known there for sustained belching.
🤨
I live in the same Michigan town as Nick. Our local police only give out warnings unless they clock you going FAST-FAST.
“Super duper awesome” love watching these with my kid, always great content, thank you
More discussion about ergosphere other than black hole dragging space time with it? Maybe with help of diagram?
Inside the ergosphere, the time component switches sign, so it behaves more like space. You won't be able to stay in one place anymore than you can stay at one point in time.
@@ScienceAsylum What happens with the space components? I've heard people saying before that beyond the event horizon time and space switch roles. Kind of difficult to picture that. Didn't even hear about the ergosphere until today, so thanks for talking about that.
@@ScienceAsylum Okay, but I'm having trouble imagining the time switches sign so it behaves more like space
Luke, the space components don't switch sign until inside the event horizon, so we don't have to worry about that in the ergosphere... thankfully.
@@ScienceAsylum Speak for yourself, I've been twenty one for ten years now.
"Conservation of energy shall not be vio-lat-ed!"
Dark Energy: "What am I, chopped liver?!"
I talk about that in a different video: ruclips.net/video/cnGYMe6GBeQ/видео.html
Does all black holes spin as they are made from rotating or spinning stars ?
Yep! As long as the star that made it was spinning (which is _very_ likely), then the black hole will be spinning too.
@@ScienceAsylum So like almost all black holes are spinning?
Dude, usualy i satay out of topic coments because, generaly, my english doesn't keep up with a mor informal way os talk but, man. ia have to stop to say that, aside the great information, you puns are awesome. Some day i'll be in you patreon rank. Until ther, gonna keep working. Nice job, dude, thanks for the content.
Thanks! It's always nice to read appreciative comments :-)
FAST FAST!! 2:51 ...great videos as always!!
0:50 "Unless something can be experimentally verified, you probably shouldn't call it science." Wow, that hits kinda hard in 2022.
BTW, this is my new favorite channel. I'm only scratching the surface but keep'em coming.
2:43 on right? it's event horizon, not something physical/tangible/matter , right? 2:51 that look... lol
Correct, the event horizon is just a "place" in spacetime.
@@ScienceAsylum It might be physical in the sense of turning you into a crispy critter when crossing it if the firewall thing really happens. Or has there been a well-accepted explanation for why that could not occur?
Yeah, that all depends on what a future model has to say about the matter/energy the black hole is made of.
I’m not sure we could live long enough to interact with black holes or their ergospheres... I love your videos on black holes though... and your channel in general.
At 3:10 you said that black holes absorbs angular momentum of the stuff or star that they eat ? How angular momentum can increased by absorbing or eating a stuff which already have it ....?!
@Anurag Juyal Not the best example but good attempt
Oh yes conservation of momentum
Thankxx
i like the fact that many channelas as of 2062019 lately tend to focus on video explanation not just copy stuff like wikipedia..to tell u the info without good explanations..but to adapt ot the human brain
1:27 if we don't ignore QM what happens??
Saswat Sarangi Hawking radiation
What Bob said.
the best channel of youtube! I'am braziliam and love you
I've realized there's a deep meta to your channel. That meta is you are teaching and speaking to all of your crazy clones, and that includes your viewers. But in the clone hierarchy only the question clone speaks for us. So it makes me wonder, which clone of you am i?
You've just explained some neat observation, that makes you the Nerd Clone.
O_O
I think I'm the dumb question clone... there is a dumb question clone isn't there?
@@deluxeassortment
There is now I guess! 😁
Good lord 4:19 that metric of a rotating black hole, saw just a few seconds of screen time and was enough to give me a heart attack, diabetes, osteoporosis and back pain xΔ
Well, If Humans are ever able to harvest energy from black holes (and I don't mean those pesky miniscule gravitational waves...) the'll have to be so tecnologicaly advanced that they could easily create spacetime ships to travel to other universes and beyond... aka not... not very likely... :P
Awesome video as always Science Asylum!
Yeah... and the metric it's been simplified using GR units and some clever definitions (Schwarzschild radius and angular momentum). It's actually slightly nastier than it looks.
fast fast
Why would anyone be surprised that these things spin?? They're just super dense objects in space. Do we think that they don't spin just cause they're a black hole and we cant directly observe it??
I don't think it's the idea that they can spin that's surprising, but the sheer speed and power of that spin, as well as its effect on the surrounding space. Although one might be surprised anyway, since looking at a black hole straight on, it's pretty much impossible to tell if it's spinning since there's no surface detail or shadows for our brains to tell
And there I thought the last time I'd see the Kerr metric written out was when I finished my bachelor's thesis. >_
Gr8! I gathered the direction of your presentation but couldn't move along all the way. The physics-maths of BH is so complicated that my mind gets frame dragged 😄.
Bottom line: Reference frame itself gets contorted & we don't realize it; just as much as the magician's tricks. What you see is not what happens.
Universe does not use miles-per-hour for the speed of light. It uses kilometers..
The universe doesn't use _any_ units because *it doesn't do any math at all.* It just is.
got 'em
Owned
I sometimes wonder if the Universe is the result of math giving up on trying to define nothing and deciding to see what it could do with it or maybe nothing decided to see what it could do with Math. I think the Universe consists of two things, One is nothing the other Math but I don't think either are European. 🤔
@@ScienceAsylum Or do we use "natural units" where c is 1? Didn't you do that in another video, Nick? ; P
I will get a bit of trust back in humanity if this channel gets a million subscribers at least.
You makes me happy and sometime brings laud laughter especially when you say fastfast🤣🤣🤣👏👏
Your channel is great
Physical singularities are non-physical, not because it is "fun math, but can not be reality", but because there is no way to execute an experiment and find out (test hypothesis) what is going on "in a region" disconnected from our local space-time. The assertion (the hypothesis) that there is (or is not) a singularity in the center of a black hole is unscientific because the hypothesis is unfalsifiable.
Wow, this must be the Steins;Gate timeline
Please my brain os still recovering from the last video my mind is blown twice now
Spot on as usual!!
nice pet monster I used to run around breaking the chains
What's interesting is that the idea of spinning black holes come from a very fundamental law of conservation of momentum (angular). 😊
Educational and funny. "Its naaasty @ 4:26" Thanks for sharing!
5k likes? really?! You deserve 500k at least! Continue the amazing work my idol! :D
Fabulous! I wasn't aware of this feature of rotating blackholes.
Surfing the ergosphere is basically akin to getting a free energy ride. Daring and dashing stuff. :)
@@jitteryjet7525 True. No free lunch in the realm of Physics. :)
4:25 "It's nausty" - Best part
*Black Hole is A Busy Place
Everything has to go inside*
Science asylum you are amazing.....i bet you will win noble award very soon........
So this is Kurzgesagt but with accurate details.
fastfast
another amazing video as always!
FINALLY someone comes out and says, "singularities don't really exist, that's just where our math stops working!"
Ehhh, yes and no. Our math does stop working there, but they sure are a physical entity. If we even manage to connect gravity with quantum mechanics, we will be able to describe those too.
fast fast.
Okay now we need a hawking radiation video from you.
A singularity is a concept, a mathematical infinity that may not even exist. Thank you for pointing out our lack of knowledge regarding the internals of a black hole, we really know nothing.
Kurtzgesagt did a great video on extracting energy from spinning black holes.
Thank you for the explanation,i understand now 👍👍
Thing with relativity is that it messes up all metal conceptions so much that you wonder if ‘spin’ really means the same as how earth spins or it’s some other spin in space time continuum.
Dielectric accretion disc on a super massive scale where dielectricity has overcome magnetism.
I love it when you say FAST FAST !!
Black holes: the turntables of the Universe
What i've understood about blackholes is that they spin insanely fast...
Semirotta If is was possible, which it isn't.
I honestly don't know, from what I've watched docs and videos in youtube and what not. That is just what I have learned. I've understood that blackholes are so dense and spin so fast that nothing escapes from its event horizon.
Even though rotating black holes have a ringularity, that ring is infinitely small so it basically a singularity
There is also the “Super- Radiant Scattering “ and to do it you need: a mirror surrounding the black hole and an electromagnetic Ray gun. All you need to do is to shoot the electromagnetic wave gun into the mirror and will begin the process. The waves will bounce around the mirror and then The mirror and the waves will become exponentially stronger by opening some windows we can extract the energy from the black hole.
dude... you are awesome. always enlightening...
thnx
That blinking star that you point out with the arrow, looks similier to a neutron/pulsar star.
That black hole is a strong radio source, probably from in-falling matter.
36 seconds in and I already need to take a knee and just breathe for a while
"Having points or or rings of infinite density, is fun math, but cannot be reality. So all this really shows us is a place where the math doesn't match the universe, not that the universe is broken." This is almost never said. A lot of people seem to think because we can't explain it, it must be truth.